# Relay > Direct mail you can actually measure: a tracked QR code for every recipient, a call-tracking number for every campaign, and USPS delivery tracking on one live dashboard. Relay is a direct mail platform that makes physical mail as measurable as email. Every postcard carries a unique per-recipient QR code, so every scan resolves to a specific name, address, and timestamp. Campaign-level call tracking, USPS delivery events, and a live analytics dashboard close the attribution loop. ## Core capabilities - Per-recipient QR codes: every piece of mail carries a unique tracked code; scans resolve to a person - Call tracking numbers: one forwarding number per campaign with caller ID, duration, and location logging - USPS delivery tracking: piece-level mail-stream events (mailed, in transit, scanned for delivery) - Live analytics dashboard: scans, calls, delivery, and a geographic response map in real time - Artwork analysis: automated grading of hook, offer, CTA, design, and print readiness - Address verification: USPS-certified address validation before mailing - API and webhooks: send postcards programmatically; receive scan, delivery, and mailing events via webhooks - Self-print exports: download print-ready files with QR codes for your own print shop - Client portals: white-label reporting for agencies managing campaigns for multiple clients - Merge-field destination URLs: per-recipient landing pages with dynamic merge tokens ## Who it serves - Real estate agents and teams (farming, just-listed/just-sold) - Home services contractors (radius mailers around completed jobs) - Dental practices (new-mover welcome, recall campaigns) - Marketing agencies (multi-client campaign management with portals) - DTC and subscription brands (API-triggered winback and retention mail) - Retail chains (store-driver mail with per-trade-area attribution) - Franchise systems (corporate brand control, per-location tracking) - Commercial printers and lettershops (add per-recipient QR tracking to existing runs) - B2B sales teams (short prospect lists with hand-raiser identification) ## Pages - [Homepage](https://mailwithrelay.com/) - [How it works](https://mailwithrelay.com/how-it-works) - [Pricing](https://mailwithrelay.com/pricing) - [API documentation](https://mailwithrelay.com/developers) - [Free mailer grader](https://mailwithrelay.com/rate-my-artwork) - [Contact](https://mailwithrelay.com/contact) - [Blog](https://mailwithrelay.com/blog) ## Industry pages - [Real estate](https://mailwithrelay.com/industries/real-estate) - [Home services](https://mailwithrelay.com/industries/home-services) - [Dental](https://mailwithrelay.com/industries/dental) - [Agencies](https://mailwithrelay.com/industries/agencies) - [DTC & subscription](https://mailwithrelay.com/industries/dtc-brands) - [Retail chains](https://mailwithrelay.com/industries/retail) - [Franchises](https://mailwithrelay.com/industries/franchises) - [Printers & lettershops](https://mailwithrelay.com/industries/printers) - [B2B](https://mailwithrelay.com/industries/b2b) ## Blog posts - [Your mail campaign worked. Now what?](https://mailwithrelay.com/blog/what-to-do-with-direct-mail-response-data) - [Direct mail for B2B: how to reach the business owners who never pick up](https://mailwithrelay.com/blog/direct-mail-b2b-small-business-prospecting) - [Making offset printing digital: per-recipient QR codes from your addressing inkjet](https://mailwithrelay.com/blog/offset-printing-personalized-qr-inkjet-addressing) - [Direct mail attribution is broken. Per-recipient QR codes fix it.](https://mailwithrelay.com/blog/direct-mail-attribution-per-recipient-qr) - [Beyond response rate: how to measure real direct mail engagement](https://mailwithrelay.com/blog/direct-mail-engagement-metrics) - [Should you print your own direct mail? Self-print vs full-service, honestly](https://mailwithrelay.com/blog/print-your-own-direct-mail) - [How to improve direct mail response rates: the 40/40/20 rule in practice](https://mailwithrelay.com/blog/improve-direct-mail-response-rate) - [Postcard print specs in plain English: DPI, bleed, and safe zones](https://mailwithrelay.com/blog/postcard-design-print-specs) - [What direct mail really costs in 2026: a per-piece budget breakdown](https://mailwithrelay.com/blog/direct-mail-cost-per-piece) - [Variable data printing: how personalized mail lifts response rates](https://mailwithrelay.com/blog/variable-data-printing-personalization) - [What ROI should you expect from direct mail? Honest benchmarks](https://mailwithrelay.com/blog/direct-mail-roi-benchmarks) - [Digital printing vs offset for direct mail: which should you actually use?](https://mailwithrelay.com/blog/digital-printing-vs-offset-direct-mail) - [Direct mail + digital marketing: the omnichannel lift nobody budgets for](https://mailwithrelay.com/blog/direct-mail-and-digital-marketing) - [The 7 direct mail KPIs I actually watch (and 3 I ignore)](https://mailwithrelay.com/blog/direct-mail-kpis-metrics) - [Do millennials and Gen Z read direct mail? The data says absolutely](https://mailwithrelay.com/blog/direct-mail-millennials-gen-z) - [Call tracking for direct mail: how one phone number proves what's working](https://mailwithrelay.com/blog/call-tracking-numbers-direct-mail) - [The psychology of physical mail: why paper beats pixels in the brain](https://mailwithrelay.com/blog/psychology-of-physical-mail) - [QR codes on direct mail: 9 best practices for postcards that get scanned](https://mailwithrelay.com/blog/qr-codes-on-direct-mail-best-practices) - [Direct mail response rates vs email: what the data really says](https://mailwithrelay.com/blog/direct-mail-response-rates-vs-email) - [How to track direct mail campaigns: 5 methods that actually work](https://mailwithrelay.com/blog/how-to-track-direct-mail-campaigns) ## Full content For the complete text of all pages, see [llms-full.txt](https://mailwithrelay.com/llms-full.txt).